JP2993937B1 - LCD display - Google Patents

Abstract

Abstract: [PROBLEMS] While using a liquid crystal panel for monochrome display,
Realization of a liquid crystal display that enables arbitrary color display. SOLUTION: A transmissive liquid crystal panel 18, a main body 16,
A reflector 19 as a phosphor holding member detachably housed in the main body 16; phosphors 28R, 28G, 28B for generating visible light attached to the surface of the reflector 19; lamp
And a liquid crystal display 10 having a structure in which visible light generated from the phosphors 28R, 28G, 28B in response to ultraviolet rays is guided to the rear surface of the liquid crystal panel 18 arranged to face the reflection plate 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display, and more particularly, to a liquid crystal display capable of performing color display while using a transmission type monochrome liquid crystal panel.

[0002]

2. Description of the Related Art Today, liquid crystal displays are widely used as various information display means. There are various types and types of liquid crystal displays depending on the purpose of use, and when used as a television screen or a computer display, a liquid crystal display capable of high-resolution dot matrix display is used. These relatively high-grade liquid crystal displays have a large number of fine liquid crystal elements arranged in a single liquid crystal panel, for example, 640 × 200, and individually control ON / OFF of each liquid crystal element. Therefore, complicated manufacturing steps and expensive control circuits are required. On the other hand, in applications where a very high display quality is not required, such as a display unit of a calculator or an indicator of an electronic device, the 7
As in the case of a segment type liquid crystal display, a liquid crystal display having a simpler configuration and lower cost is used, in which a relatively small number of relatively large liquid crystal elements are combined.

A liquid crystal display has a structure in which display is realized by controlling transmission (white) / blocking (black) of light in accordance with ON / OFF switching of voltage application. However, for the purpose of displaying information, it is preferable to use color display that is more noticeable than monochrome display. Therefore, in the above-described dot matrix type liquid crystal display, R (red), G (green),
A multi-color display is realized by arranging any one of B (blue) color filter layers and configuring one pixel by liquid crystal elements of three colors (RGB). By controlling the combination of liquid crystal elements that are turned on for each pixel, it is possible to express complex colors in the entire liquid crystal panel.

[0004]

However, in this case, not only the number of liquid crystal elements is required to be at least three times as large as that of a monochrome liquid crystal panel to realize the same resolution, but also a more complicated and expensive control circuit is required. Will be required. And depending on the application of the liquid crystal display, there is no need to express complicated colors like the above-mentioned high-grade liquid crystal display, but rather there is a demand to easily colorize the existing monochrome liquid crystal from the viewpoint of cost. .

The present invention has been devised in order to meet the above-mentioned demand, and it is possible to display an arbitrary color using a relatively inexpensive monochrome liquid crystal panel as a main body regardless of the grade. It is intended to realize a simple liquid crystal display.

[0006]

In order to achieve the above object, a liquid crystal display according to the present invention comprises a transmissive liquid crystal panel, a main body for supporting the liquid crystal panel, and a liquid crystal panel housed in the main body. A liquid crystal display comprising: a phosphor holding member; a phosphor for generating visible light adhered to a surface of the phosphor holding member; and an ultraviolet light emitting lamp that emits ultraviolet light.
The fluorescent material holding member faces the rear surface of the liquid crystal panel.
The reflector is arranged in such a manner that the surface of the reflector has a different shape.
Phosphors that generate visible light of different colors
The visible light generated from the phosphor upon receiving the ultraviolet light emitted from the ultraviolet light emitting lamp is guided to the back surface of the liquid crystal panel exposed in the main body.
When the ultraviolet light emitting lamp is turned on and the surface of the reflector serving as the phosphor holding member is irradiated with ultraviolet light, the phosphor is excited to generate predetermined visible light. If this visible light is incident on the rear surface of the transmissive liquid crystal panel, color display can be performed on a monochrome liquid crystal panel.

Further, the reflection constituting the phosphor holding member is provided.
The surface of the plate has multiple visible light sources of different colors.
Since different kinds of phosphors are attached, a plurality of luminescent colors can be obtained by irradiating ultraviolet rays from an ultraviolet light emitting lamp, and a multi-color display on a liquid crystal panel can be realized. In this case, it is desirable to prevent color mixing by forming a partition plate between a plurality of types of phosphors. The above reflector,
If it is configured to be removably housed in the main body, it is possible to easily change the display color on the liquid crystal panel by replacing it with another reflector coated with a different type of phosphor as necessary. It becomes possible. In addition, the number of the above-mentioned ultraviolet light emitting lamps
There is no limitation, and the display brightness required for a liquid crystal display is
First, install one or more UV lamps.
I just need.

[0008] Another liquid crystal display according to the present invention is a transmissive type.
A liquid crystal panel, a main body for supporting the liquid crystal panel,
A phosphor holding member housed in the main body, and the phosphor holding member;
A phosphor for visible light generation attached to the surface of the member ,
With an ultraviolet light emitting lamp that emits light
The phosphor holding member is disposed so as to be able to move around.
Made of an annular reflective belt, and on the surface of the reflective belt
Are multiple types of fluorescent light that generate visible light of different colors
The body is attached and the purple light emitted from the ultraviolet light emitting lamp
Visible light generated from the phosphor upon receiving an outside line
Structured to be guided to the back of the liquid crystal panel exposed inside
did. In this liquid crystal display, the phosphor holding member is
It is composed of an annular reflective belt that is
The surface of this reflective belt has visible light of different colors
Is coated with multiple types of phosphors
Changing the display color just by moving the shooting belt around
Becomes possible.

Further, another liquid crystal display according to the present invention.
Is a transmissive liquid crystal panel and a book supporting the liquid crystal panel.
A body, a reflection member housed in the body, and the liquid crystal.
Phosphor retention located between the back of the panel and the reflective member
A member for emitting visible light adhered to the surface of the phosphor holding member;
Irradiates ultraviolet rays to the raw phosphor and the surface of the reflecting member.
A liquid crystal display comprising an ultraviolet light emitting lamp
The phosphor holding member has a transparent property that transmits at least visible light.
And a different surface on the reflection member side of the transmission plate.
Phosphors that generate visible light of different colors
The liquid crystal panel side surface of the transmission plate
Multiple types of color filters corresponding to the emission color of the phosphor
UV light emitted from the UV light emitting lamp arranged
Visible light generated from the phosphor in response to the
The liquid crystal panel is configured to be guided to the exposed back surface of the liquid crystal panel . In this liquid crystal display,
Ultraviolet light emitted from the light-emitting lamp is reflected by the reflective member.
Incident on the phosphor on the surface of the transmission plate to generate visible light.
This visible light passes through the transmission plate and enters the back of the liquid crystal panel.
To realize the colorization of the liquid crystal panel. And on
Apply visible light of different colors to the reflective member side surface of the transmission plate.
Since multiple types of phosphors to be generated are attached,
Multiple emission colors by UV irradiation from external light emitting lamp
To achieve multi-color display on the LCD panel.
Can Ru. In addition, the surface of the transmission plate on the liquid crystal panel side
Multiple types of color filters corresponding to emission colors are arranged
Therefore, color display with high purity can be performed.

[0010] Still another liquid crystal display according to the present invention comprises:
Transmissive liquid crystal panel and main body supporting liquid crystal panel
And an ultraviolet light emitting lamp disposed in the main body,
Arranged inside the main unit so as to face the back of the LCD panel
Reflecting member, the ultraviolet light emitting lamp and the reflecting portion
A plurality of fluorescent material holding members interposed between the fluorescent material and the fluorescent material;
A phosphor for visible light generation attached to the surface of the body holding member;
A liquid crystal display device comprising:
Consists of a transmission plate that transmits at least visible light,
The surface of the transmission plate on the side of the UV-emitting lamp is different for each transmission plate.
Phosphors that generate visible light of different colors
UV light emitted from the UV lamp
Each fluorescent substance so that the fluorescent substance to be irradiated can be selected alternatively.
An optical body holding member is movably arranged, and the ultraviolet light emitting
Generated from phosphors in response to ultraviolet light emitted from the pump
Visible light is exposed on the back of the liquid crystal panel exposed inside the main body.
It was configured to be guided to the surface. In this liquid crystal display, it is possible to change the type of phosphor to be irradiated with ultraviolet light only by moving each phosphor holding member, and it is possible to easily change the display color on the liquid crystal panel. . When multiple ultraviolet light emitting lamps are arranged in the main body,
It is desirable to interpose a plurality of phosphor holding members between each ultraviolet light emitting lamp and the reflection member.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First liquid crystal display 10 according to the present invention.
The substrate 12 and the support frame 14, as shown in FIGS.
A main body 16 having 14, one ultraviolet light emitting lamp 17 arranged along one side of the substrate 12, a liquid crystal panel 18 supported by a support frame 14, and mounted on the substrate 12. And a reflection plate 19 as a phosphor holding member.

The liquid crystal panel 18 has a liquid crystal layer 21 filled with a liquid crystal substance between a pair of glass substrates 20a and 20b opposed to each other at a predetermined distance, and has an outer surface of both glass substrates 20a and 20b. Each plastic polarizing plate
This is a so-called transmission type liquid crystal panel to which 22a and 22b are attached. Although not shown, an alignment film and a transparent electrode are actually arranged between the liquid crystal layer 21 and each of the glass substrates 20a and 20b. Here, an example is shown in which a liquid crystal material is filled in each liquid crystal element 25 constituting the 7-segment 24 for displaying numbers.
Liquid crystal panels arranged in a large number in a matrix may be used. On the surface of the polarizing plate 22b located on the back side of the liquid crystal panel 18, a protective layer 26 is formed. The protective layer 26 is made of a glass material having a property of blocking ultraviolet rays and transmitting visible light.

The reflection plate 19 is made of aluminum, and three types of phosphors are adhered to the surface thereof. That is, a phosphor 28R for emitting red light is attached to the left end of the reflecting plate 19, a phosphor 28G for emitting green light is attached to the central portion, and a phosphor 28B for emitting blue light is attached to the right end. A partition plate 30 having a certain height is arranged on the boundary between the phosphors. The reflecting plate 19 is detachably housed inside the opening 16a of the main body 16 and is provided with a red light emitting phosphor.
28R has a green-emitting phosphor 28G at the top of the 7-segment row.
Are positioned so as to correspond to the middle stage, and the blue light emitting phosphor 28B corresponds to the lower stage.

When the ultraviolet light emitting lamp 17 is supplied with power, it has a predetermined light emitting wavelength (for example, 254 nm or 36 nm).
0 nm), and the emission output can be adjusted stepwise by an inverter circuit 31. Behind the ultraviolet light emitting lamp 17, a reflection light collecting member 32 for guiding radiated light in a certain direction is arranged.

When the ultraviolet light emitting lamp 17 is turned on by the power supply, the generated ultraviolet light is incident on each of the phosphors 28R, 28G, 28B attached to the surface of the reflection plate 19 to excite them. As a result, the colored visible light generated according to the type of each phosphor is reflected on the surface of the reflection plate 19 and
The visible light guided to the side and transmitted through the protective layer 26 is
To reach the back of. On the liquid crystal panel 18 side, each liquid crystal element 25 is ON / OFF controlled by the control / drive circuit 33, and visible light incident on the liquid crystal element 25 which is ON, that is, in a transmission state, is radiated to the outside as it is. On the other hand, a liquid crystal element that is turned off, that is, in a shielding state
The visible light incident on 25 is blocked there and is not radiated outside.

As described above, ON / OFF of each liquid crystal element 25 is performed.
Is selectively executed, it is possible to display an arbitrary number every seven segments 24 on the entire liquid crystal panel 18. Moreover, three colors of visible light are generated according to the types of the phosphors 28R, 28G, and 28B, and each of them reaches the rear surface of the liquid crystal panel 18 without being mixed by the presence of the partition plate 30, so that the upper stage The number sequence can be displayed in red, the middle number sequence can be displayed in green, and the lower number sequence can be displayed in blue, which is clearly different from each other. Further, by adjusting the output of the inverter circuit 31, the luminance can be adjusted.

Since the reflecting plate 19 is removably housed in the main body 16, it can be easily replaced with another reflecting plate on which different kinds of phosphors are adhered. As a result, the display color of each column appearing on the liquid crystal panel can be exchanged or changed to a completely different color combination. FIG. 1 shows an example in which a yellow light-emitting phosphor 28Y, a blue light-emitting phosphor 28B, and a green light-emitting phosphor 28G are replaced with a reflecting plate 19 from the left end. Of course, when it is necessary to display the numbers in each column in the same emission color, it may be replaced with a reflector on which one kind of phosphor is adhered. Although the polarizing plates 22a and 22b made of plastic have the property of being deteriorated by the irradiation of ultraviolet rays, the ultraviolet rays emitted from the ultraviolet light emitting lamp 17 can be cut off by the protective layer 26 disposed on the back side of the liquid crystal panel 18. Therefore, it is possible to effectively prevent the polarizing plates 22a and 22b from being deteriorated.

FIG. 3 shows a second liquid crystal display according to the present invention.
34 is shown. This adopts a bar graph type liquid crystal panel 18 in which a plurality of trapezoidal liquid crystal elements 25 having different sizes are arranged so as to gradually increase from the left side to the right side, instead of using a 7 segment type liquid crystal panel. Another feature is the first liquid crystal display.
Same as 10. In this case, the ultraviolet light emitting lamp 17 is turned on.
In addition, by selectively turning on / off each liquid crystal element 25, it is possible to display an increase or decrease in the volume or other physical quantity. Moreover, different display colors (red, green, and blue from the left end) can be obtained for each of the four liquid crystal elements 25, so that the visual effect can be further enhanced.

FIG. 4 shows a third liquid crystal display according to the present invention.
35 is shown. This is achieved by disposing a pair of ultraviolet light emitting lamps 17, 17 along both sides of the substrate 12, and forming a liquid crystal panel 18 on reflective light collecting members 32, 32 arranged so as to surround the respective ultraviolet light emitting lamps 17, 17. Is characterized by the fact that is arranged. That is, here, the main body 16 is formed by the substrate 12 and the pair of reflection / condensing members 32,32. By irradiating the phosphor 28R on the surface of the reflection plate 19 with the ultraviolet light emitting lamps 17 from both sides, a sufficient light emission amount is secured, and the display brightness of the liquid crystal panel 18 can be further increased. Becomes Here, one kind of phosphor 28R
Although the example in which the reflecting plate 19 with the attached thereon is accommodated in the main body 16 is shown, as in the above, the reflecting plate 19 is replaced with a reflecting plate on which a plurality of types of phosphors are attached, and a plurality of display colors are displayed. It may be realized.

FIG. 5 shows a fourth liquid crystal display according to the present invention.
36 is shown. This is characterized in that an annular reflection belt 38 is arranged so as to be able to move around the substrate instead of detachably disposing the reflection plate on the substrate 12 of the main body 16. That is, the reflection belt 38 is formed by connecting both ends of a flexible belt-shaped body, forming an aluminum layer on the surface by vapor deposition, and further forming a plurality of types of phosphors 28R, 28G, 28B on the surface. , 28Y... With a fixed width. A pair of rotating rollers 39, 39 are disposed in contact with each other inside both ends of the reflection belt 38, and the lower surface of the reflection belt 38 is attached to the substrate 12 by shafts 40, 40 connected to the centers of the rollers 39, 39. It is supported at a height that does not make contact. When the shafts 40, 40 of the rotating rollers 39, 39 are rotated in the same direction manually or by using a drive source such as a motor, the surface of the reflection belt 38 moves in the left-right direction.

In this case, as in the case of the first liquid crystal display 10, the liquid crystal panel 18 mounted on the support frames 14,
Using three rows of 7-segments 24 of three digits, different types of phosphors of the reflection belt 38 are positioned so as to correspond to each row.

When the ultraviolet light emitting lamp 17 arranged along one side of the substrate 12 is turned on, the generated ultraviolet light is incident on each phosphor adhered to the surface of the reflection belt 38, and the predetermined ultraviolet light is emitted. Visible light with color is generated. As a result,
Each number displayed on the liquid crystal panel 18 can be illuminated with a different color for each column.

Further, the display color of each row can be easily changed by moving the reflection belt 38 by a predetermined amount as needed and changing the type of phosphor corresponding to each row of the 7 segments 24. Although not shown, the liquid crystal panel 18
By providing a partition plate for partitioning between the rows on the back side of the panel, color mixing between the rows can be prevented. In this case, it is necessary to set the height of each partition plate so that the end surface does not contact the surface of the reflection belt 38.

FIG. 6 shows a fifth liquid crystal display according to the present invention.
FIG. 41 is a side view showing 41. This includes the substrate 12 and the support frame 14,
A reflection member 42 and an ultraviolet light-emitting lamp 17 are housed in a main body 16 provided with 14, and the liquid crystal panel 18 is supported by the support frames 14 and 14 as a phosphor holding member on the back side of the liquid crystal panel 18. Is characterized in that the transmission plate 43 is disposed.

The transmission plate 43 is made of a glass material having a property of transmitting visible light and blocking ultraviolet light, and has a shape and an area substantially equal to those of the liquid crystal panel 18. On the reflecting member side surface of the transmission plate 43, a phosphor (for example, a red light emitting phosphor 28) for generating colored visible light is provided.
R) is formed. Further, a color filter (for example, a red filter 44R) corresponding to the emission color of the phosphor is attached to the liquid crystal panel side surface. This transmission plate 43
Are detachably arranged by engaging both sides with grooves 45, 45 formed at the tips of the support frames 14, 14, respectively. The reflecting member 42 has curved portions 42 at both ends of an aluminum plate material.
a and 42b are provided, and the ultraviolet light emitting lamp 17 is arranged inside one curved portion 42a. On the surface of the flat portion 42c of the reflection member 42, the same red light emitting phosphor 28R as that attached on the surface of the transmission plate 43 is attached. The reflection member 42 is arranged so as to be able to be pulled out in the front direction of the drawing, and can be replaced with another reflection member as needed. The liquid crystal panel 18 corresponds to the above-described one for displaying the 7-segment or bar graph or the one for displaying the dot matrix.

When the ultraviolet light emitting lamp 17 is turned on by power supply, the generated ultraviolet light is reflected by the inner surface of the curved portion 42a of the reflecting member and enters the flat portion 42c. Most of the ultraviolet light excites the phosphor 28R on the surface of the flat portion 42c, and generates red visible light. The generated visible light passes through the transmission plate 43 and the color filter 44R, and passes through the liquid crystal panel 18.
To reach the back of. The rest of the UV light is
The light is reflected by 42c and enters the phosphor 28R on the surface of the transmission plate 43,
This is excited to produce red visible light. The visible light generated here also passes through the transmission plate 43 and the color filter 44R and reaches the rear surface of the liquid crystal panel 18. Incidentally, since the excess ultraviolet rays are cut by the transmission plate 43, there is no danger that the polarizing plate 22b is damaged by the ultraviolet rays.

On the liquid crystal panel 18 side, each liquid crystal element is ON / OFF controlled by a control / drive circuit 33.
That is, the visible light incident on the liquid crystal element in the transmission state is radiated to the outside as it is. In contrast, OF
F, that is, visible light incident on the liquid crystal element in the shielded state is blocked there, and is not radiated to the outside. As described above, by selectively performing ON / OFF of each liquid crystal element, it is possible to realize color display of the entire liquid crystal panel. Moreover, since the color filter 44R is disposed between the transmission plate 43 and the back surface of the liquid crystal panel 18, a color display with higher purity can be performed. However, the color filter 44R is not essential and may be omitted depending on the purpose of use.

As described above, since the transmission plate 43 and the reflection member 42 are both detachable from the main body 16, the transmission plate 43 is provided with a phosphor and a color filter corresponding to another emission color. The liquid crystal panel can be replaced by exchanging the reflective member 42 with a similar phosphor.
The display color on 18 can be easily changed. Although an example in which one ultraviolet light emitting lamp 17 is used has been described above, another ultraviolet light emitting lamp is arranged on the other curved portion 42b side of the reflection member 42 so as to increase the display luminance. Is also good.

FIG. 7 shows a sixth liquid crystal display according to the present invention.
FIG. 46 is a side view showing 46. This includes the substrate 12 and the support frame 14,
A reflection member 42 and an ultraviolet light-emitting lamp 17 are housed in a main body 16 provided with 14, and the liquid crystal panel 18 is supported by the support frames 14 and 14 as a phosphor holding member on the back side of the liquid crystal panel 18. The fifth liquid crystal display 41 is common in that the transmission plate 43 is disposed, but has the following differences. No phosphor is arranged on the reflection member 42 side.
A plurality of types of phosphors that realize different emission colors are attached to the lower surface of the transmission plate 43 (here, a phosphor 28R for red emission and a phosphor 28G for green emission). A plurality of types of color filters corresponding to different emission colors are arranged on the upper surface of the transmission plate 43 (here, a color filter 44R for red and a color filter 44G for green).

When the ultraviolet light emitting lamp 17 is turned on by the power supply, the generated ultraviolet light is reflected on the inner surface of the curved portion 42a of the reflecting member and is incident on the flat portion 42c, where it is reflected and covered on the surface of the transmission plate 43. Phosphors 28R, 28G worn
To excite. As a result, visible light of two colors corresponding to the type of each phosphor is generated, and this visible light passes through the transmission plate 43 and the color filters 44R and 44G and reaches the rear surface of the liquid crystal panel 18. In this case, the transmission plate 43 includes a phosphor 28R for emitting red light and a phosphor 28G for emitting green light, and a color filter for red.
Since the color filter 44G and the color filter 44G for green are provided, red display and green display on the liquid crystal panel 18 are realized. Needless to say, phosphors and color filters of three or more colors can be arranged as necessary. Note that, similarly to the fifth liquid crystal panel 41, another ultraviolet light emitting lamp may be disposed on the other curved portion 42b side of the reflection member.

Since the transmission plate 43 is slidably mounted in the engagement grooves 45, 45 of the support frames 14, 14, it can be easily connected to other transmission plates provided with combinations of different types of phosphors and color filters. Can be exchanged. Therefore, the display color of the liquid crystal panel 18 can be easily changed.

FIG. 8 shows a seventh liquid crystal display 48 according to the present invention.
It shows. The main body 16 includes the substrate 12 and the supporting frames 14, 14, a pair of ultraviolet light emitting lamps 17 a and 17 b arranged along both sides of the substrate 12, and a back side of each of the ultraviolet light emitting lamps 17 a and 17 b. Reflective members 49, 49 arranged so as to surround the liquid crystal panel 18, a transmissive liquid crystal panel 18 supported by the support frames 14, 14, and a planar reflective member 50 made of aluminum and fitted on the surface of the substrate 12. And a first transmission plate 51a to a fourth transmission plate 51d as phosphor holding members.

Each of the transmission plates 51a to 51d is made of a glass material having a property of transmitting visible light and cutting off ultraviolet rays, and is equal to or larger than the length of the ultraviolet light emitting lamps 17, 17 in the longitudinal direction. It has a length. Each transmission plate 51
a to 51d are on the surface of the substrate 12 or the support frame 14,
It is rotatably mounted on the inner surface of 14 and is movably arranged at least within a range of 90 degrees by rotating about a shaft 52. The transmission plates 51a to 51d can be manually rotated, or may be rotated by a drive source such as a rotary solenoid. When the transmission plates 51a to 51d are arranged perpendicular to the substrate 12, different types of phosphors are attached to the surface facing the ultraviolet light emitting lamp 17, respectively. Here, the phosphor 28R for red light emission is provided on the surface of the first transmission plate 51a, the phosphor 28B for blue light emission is provided on the surface of the second transmission plate 51b, and the third transmission plate.
On the surface of 51c, a phosphor 28G for green light emission is provided on the fourth transmission plate 51G.
A phosphor 28Y for yellow light emission is attached to the surface of d.

When the first transmitting plate 51a is arranged at a vertical position and the ultraviolet light emitting lamp 17a is turned on, the generated ultraviolet light is irradiated to the red light emitting phosphor 28R on the surface of the first transmitting plate 51a. Generates red light. This red light passes through the first transmission plate 51a and passes through the planar reflection member 50.
Of the liquid crystal panel 18 which is reflected and reaches the rear surface of the liquid crystal panel 18 disposed opposite to the liquid crystal panel 18.

On the liquid crystal panel 18 side, each liquid crystal element is ON / OFF controlled by a control / drive circuit 33.
That is, the red light incident on the liquid crystal element in the transmission state is radiated to the outside as it is. In contrast, OF
F, that is, the red light incident on the liquid crystal element in the shielded state is blocked there, and is not radiated to the outside. As described above, by selectively executing ON / OFF of each liquid crystal element, it is possible to display arbitrary numbers, characters, figures, and the like in red on the entire liquid crystal panel.

Since the surplus ultraviolet rays are cut by the first transmission plate 51a, the phosphor 28B of the second transmission plate 51b is not excited at the same time, so that blue light is not generated and color mixing cannot occur. . If the first transmission plate 51a is tilted toward the substrate 12 and the second transmission plate 51b is set upright, a blue display is realized. Further, by turning off the ultraviolet light emitting lamp 17a, setting the third transmission plate 51c upright, and turning on the other ultraviolet light emitting lamp 17b, green display is possible. Further, when the third transmission plate 51c is tilted toward the substrate 12 and the fourth transmission plate 51d is set upright, yellow display is realized. Of course, if both the ultraviolet light emitting lamps 17a and 17b are turned on at the same time and the first transmission plate 51a and the third transmission plate 51c are set up, a mixed color display of red and green is realized, and the second transmission plate 51b and Fourth transmission plate
By setting 51d, a mixed color display of blue and yellow is realized. Note that a common phosphor may be attached to the transmission plates 51a to 51d corresponding to the ultraviolet light emitting lamps 17a and 17b. In this case, although the number of colors that can be displayed is reduced, both the ultraviolet light emitting lamps 17a and 17b are turned on at the same time, and a transmission plate having a phosphor having a common emission color is vertically set on both left and right sides. By standing, display luminance in the color can be increased.

In the above, two ultraviolet light emitting lamps
17a, 17b, and each ultraviolet light emitting lamp 17a,
An example was shown in which two transparent plates were interposed between 17b and the planar reflecting member 50, respectively, so that a total of four colors can be displayed. In addition, if two transmission plates are interposed between the four ultraviolet light emitting lamps and the planar reflection member 50, a maximum of eight colors can be displayed.

FIG. 9 shows an eighth liquid crystal display 54 according to the present invention.
It shows. The main body 16 includes the substrate 12 and the supporting frames 14, 14, a planar light emitting member 56 removably disposed in the main body 16, and the transmission type supporting member supported by the supporting frames 14, 14. And a liquid crystal panel 18.

As shown in FIG. 10, the planar light-emitting member 56 has a rear substrate 58 made of an insulating material such as a glass plate and a front substrate 60 made of a transparent insulating material such as glass at a predetermined interval. The outer periphery of both substrates is hermetically sealed with a sealing material (not shown) to form an envelope 62, and the envelope 62 is filled with an ultraviolet radiation gas mainly composed of Xe. Above back substrate
On the upper surface of 58, a plurality of strip-shaped cathodes 64 made of Ag / Pd-based paste or the like are formed at regular intervals. On the lower surface of the front substrate 60, a NESA film (SnO
2) and a plurality of strip-shaped transparent anodes 66 made of ITO film (In2O3.SnO2) are formed at regular intervals (for convenience of illustration, only one transparent anode 66 is shown in FIG. 10). Although actually shown, a plurality of transparent anodes 66 are formed so as to be parallel at a certain interval.)

The plurality of cathodes 64 and the transparent anode 66 are arranged so as to intersect with each other with a certain gap therebetween.
A discharge cell 68 is formed at each intersection of the two electrodes. Also,
On the upper surface of the rear substrate 58, a grid-like barrier rib 70 surrounding the discharge cell 68 is formed. In each of the discharge cells 68, a phosphor 72 for realizing a desired predetermined luminescent color is provided. As the phosphor 72, a common one may be adopted for all the discharge cells 68 of the planar discharge light emitting member 56, but a plurality of types of phosphors realizing different emission colors for each predetermined area are attached. You may comprise so that it may be arrange | positioned.

When a voltage is applied between the transparent electrode 66 and the cathode 64, a discharge is generated in the discharge cell 68 to generate ultraviolet rays. When the ultraviolet light excites the phosphor 72, colored visible light is generated, and this visible light passes through the transparent anode 66 and the front substrate 60 and reaches the rear surface of the liquid crystal panel 18,
The display on the liquid crystal panel 18 is illuminated. Planar light-emitting member 56
Is connected to a control / drive circuit 74 disposed on the back side of the substrate 12, and by selectively applying a voltage to the cathode 64 and the transparent anode 66 via the control / drive circuit 74, an arbitrary discharge The cell 68 can be turned on. Therefore, the control / drive circuit 33 on the liquid crystal panel side and the planar light emitting member
By synchronizing the control / drive circuit 74 on the 56 side and making the display area on the liquid crystal panel 18 correspond to the lighting area of the planar light emitting member 56, the minimum necessary illumination can be realized.

Since the planar light emitting member 56 is detachably disposed in the main body 16, it can be replaced with one having a different kind of phosphor 72, and the display color on the liquid crystal panel 18 can be changed as required. Can be changed. In addition, as a planar light emitting member 56, a plurality of discharge cells having phosphors for R, G, and B light emission are aggregated to form one pixel, and a large number of such discharge cells are arranged in a dot matrix form. A planar light emitting member may be employed. In this case, the display color of the liquid crystal display can be finely changed only by selecting and changing the combination of the discharge cells to be turned on for each pixel without replacing the planar light emitting member.

[0043]

As described above, in the liquid crystal display according to the present invention, a mechanism is provided on the back side of the transmission type liquid crystal panel to generate visible light by exciting the phosphor with ultraviolet rays. Therefore, color display can be easily realized while using a monochrome liquid crystal panel. Also,
Multiple types of phosphors that generate visible light of different colors
So it can be used for UV irradiation from UV lamps
Therefore, multiple emission colors can be obtained, and a multicolor
Can be realized.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first liquid crystal display according to the present invention.

FIG. 2 is a partial sectional view showing a first liquid crystal display.

FIG. 3 is a perspective view showing a second liquid crystal display according to the present invention.

FIG. 4 is a perspective view showing a third liquid crystal display according to the present invention.

FIG. 5 is a perspective view showing a fourth liquid crystal display according to the present invention.

FIG. 6 is a partial sectional view showing a fifth liquid crystal display according to the present invention.

FIG. 7 is a partial sectional view showing a sixth liquid crystal display according to the present invention.

FIG. 8 is a partial sectional view showing a seventh liquid crystal display according to the present invention.

FIG. 9 is a side view showing an eighth liquid crystal display according to the present invention.

FIG. 10 is a sectional view showing a planar light emitting member according to an eighth liquid crystal display.

[Explanation of symbols]

 10 First liquid crystal display 12 Substrate 14 Support frame 16 Main body 17 Ultraviolet light emitting lamp 18 Liquid crystal panel 19 Reflector 28R Red light emitting phosphor 28G Green light emitting phosphor 28B Blue light emitting phosphor 28Y Yellow light emitting phosphor 34 Second liquid crystal display 35 Third liquid crystal display 36 Fourth liquid crystal display 38 Reflective belt 41 Fifth liquid crystal display 42 Reflective member 43 Transmission plate 44R Red color filter 44G Green color filter 46 Sixth Liquid crystal display 48 Seventh liquid crystal display 50 Flat reflecting member 51a First transmitting plate 51b Second transmitting plate 51c Third transmitting plate 51d Fourth transmitting plate 54 Eighth liquid crystal display 56 Planar light emission Member 58 Back substrate 60 Front substrate 62 Enclosure 64 Strip cathode 66 Transparent anode 68 Discharge cell 72 Phosphor

Claims (7)

(57) [Claims] 1. A transmissive liquid crystal panel, a main body supporting the liquid crystal panel, a phosphor holding member housed in the main body, and a visible light generator attached to a surface of the phosphor holding member. And a liquid crystal display comprising an ultraviolet light emitting lamp that emits ultraviolet light , wherein the phosphor holding member is
Reflector placed opposite the back of the liquid crystal panel
And the surface of the reflector has visible light of different colors
A plurality of types of phosphors are generated, and visible light generated from the phosphors in response to ultraviolet rays emitted from the ultraviolet light emitting lamp is guided to the back surface of the liquid crystal panel exposed in the main body. A liquid crystal display characterized by the following. 2. A partition plate is formed between said plurality of types of phosphors.
The liquid crystal display device according to claim 1, characterized in that have been made. 3. The reflector is detachably mounted in the main body.
The liquid crystal display according to claim 1, wherein the liquid crystal display is housed in a liquid crystal display. 4. A transmissive liquid crystal panel and said liquid crystal panel
Supporting main body, and phosphor holding housed in the main body
A member for emitting visible light adhered to the surface of the phosphor holding member;
Raw phosphors and ultraviolet light-emitting lamps that emit ultraviolet light
A liquid crystal display comprising: the phosphor holding member,
It consists of an annular reflective belt that is arranged so that it can move freely.
Generates visible light of different colors on the surface of the reflective belt
And a plurality of types of phosphors,
Generated from phosphors in response to ultraviolet light emitted from the pump
Visible light is exposed on the back of the liquid crystal panel exposed inside the main body.
A liquid crystal display characterized by being guided to a surface . 5. A transmissive liquid crystal panel and said liquid crystal panel
Supporting main body, and reflection member housed in the main body
Is disposed between the back surface of the liquid crystal panel and the reflection member.
Phosphor holding member, and the phosphor holding member adhered to the surface of the phosphor holding member.
Fluorescent material for generating visible light, and a purple
Liquid crystal display with ultraviolet light emitting lamp that radiates outside line
Wherein the phosphor holding member emits at least visible light.
A transmission plate for transmitting light, and a surface of the transmission plate on a reflection member side.
The plurality of types to produce emitting visible light of different colors of firefly
A light body is attached and the liquid crystal panel side table of the transmission plate
The surface has a plurality of types of colors corresponding to the emission colors of the phosphors.
-A filter is arranged and radiated from the UV lamp
Visible light generated from the phosphor in response to the ultraviolet light
Guided to the back of the LCD panel exposed inside the main body
A liquid crystal display characterized by having such a configuration . 6. A transmission type liquid crystal panel and said liquid crystal panel
Supporting main body, and ultraviolet light emission disposed in the main body
The lamp faces the back of the LCD panel inside the main unit
A reflecting member arranged so that
Holding a plurality of phosphors interposed between the lamp and the reflection member
A member for emitting visible light adhered to the surface of the phosphor holding member;
A liquid crystal display comprising a raw phosphor, wherein
The light body holding member is a transmission plate that transmits at least visible light.
The surface of the transmission plate on the side of the ultraviolet light-emitting lamp
Phosphors that generate visible light of different colors for each plate
Respectively, and emitted from the UV lamp
Phosphor to be irradiated with the selected ultraviolet light can be selected
As described above, each phosphor holding member is movably arranged, and
Fluorescent substance receiving ultraviolet rays emitted from ultraviolet light emitting lamp
The visible light generated from the
A liquid crystal display characterized by being guided to the back of a crystal panel . 7. A liquid crystal display device according to claim 1, wherein the this <br/> which the ultraviolet lamps there are multiple.